Regulatory signs
No passing zone
Standard MUTCD design · not an official government site
What it means
This pennant marks the start of a stretch where passing is prohibited, and its shape and position are part of the message: it is the only pennant in the sign system and it is mounted on the left side of the road, facing the driver who might be considering a pass. It backs up the solid yellow line already painted along the centre. The zones it defines are places where a passing manoeuvre cannot be completed safely within the sight distance available, such as curves, crests and junction approaches.
How it gets misread
Drivers sometimes think the pennant prohibits passing only for traffic moving in the direction it faces, and that oncoming drivers may pass. Others read it as applying just to trucks or to night driving. It ends passing for everyone in your direction for the length of the zone.
What to do
Stay in your lane and do not overtake while the pennant and the solid yellow line govern the road. Complete any planned pass well before the zone begins, where the centre line is broken, and if you are mid-pass as the zone approaches, return to your lane promptly rather than stretching the manoeuvre into it.
Practise this rule
- Double Yellow Lines: No Passing Either Way
Two solid yellow lines are painted down the centre of a two-lane road. What do they mean?
More regulatory signs
Sources
- Section referenced: Colorado Driver Handbook — Passing: No-Passing Zones
- Colorado Driver Handbook, January 2025 (DR 2337) — English PDF · Spanish PDF
- Retrieved 2026-10-17 from Colorado Division of Motor Vehicles
The drawing above is an original illustration created for this site, based on the sign's published shape and colour conventions. It is not an official government reproduction.